Utility for backups under linux

Wanted utility for making backups of sites on a local machine under linux.
Requirements:

• Work via ssh on port optimalnom
• The presence of sheduler
• Desirable GUI

Now working with one running in the future, it is desirable to have the ability to work with multiple.
Never found good descriptions of programs, only their lists without comparisons. Try everything for a long time. In principle, a suitable command-line utility, if there is a good guide to action.